Ej20 heads to ej25

[arnegs]

Hey guys

Anyone know of anybody who does milling on 2L heads to fit a 2.5L shortie?

And the rough cost?

Cheers.

[Andy_Mac]

Probably not the same generation but thats exactly what knockoutgiant has just had done.

[arnegs]

 Andy_Mac said:

Probably not the same generation but thats exactly what knockoutgiant has just had done.

Oh ok thanks ill pm him.

[knockoutgiant]

Ahh yeah, I done this a different way, I ended up getting CP pistons that suit EJ20 heads instead of getting the combustion chambers machined. I'm unsure who actually does the machining of them, maybe have to send to America?

Really, I think the stock EJ25 pistons work fine with the EJ20 heads, just a little extra compression ratio (I worked out mine to be 8.8:1).

Had the stock EJ25 pistons CC'd and they came out at 24.2cc, making 8.8:1 and is was fine with this, got CP to make me those same pistons just with deep valve reliefs on both sides (As I wasn't completely sure if the EJ20 head would work with the EJ25 valve reliefs)

[Ninja8)]

my heads were originally ej20K heads (v3/4 sti) and they were unshrouded etc to suit the 100mm 2.5L bore size.

HPE automotive services in Christchurch

[arnegs]

Yea ok. I've got v8 sti heads with dual avcs. Do you know roughly what they might charge?

[Ninja8)]

mine had other work done too..lapping valves, checking clearances, replacing valves etc. Best to give them a ring and have a chat to them.

[Guest]

Hijacka had it done by someone in chch too.

[hijacka]

Think he is talking about my heads. I sold them..hpe have a guy that works there is very well known for excellence in hand grinding work. It's not what I asked gavin for tbh. When I first dropped the heads in I asked them if they had the program to cnc the heads to ej25 cc and gavin said yeah yep we do sweet as after waiting about 1 month I returned to pay pickup and seen the heads had been deshouded this is not what a asked for and the deshrouding around the valve left high spots which will become hot spots not a good thing!after going backwards and forwards arguing with him getying hung up on going in there and embarrassing him in front of customers -3 months later I returned and picked them up.. he then tried to charge me another 500 on top of the 1200 or why I already paid but he told me he would cc and hand grind the heads at no charge lol but because his boy spent al day on them he thought it was justified lol I basically told him to get ***** and I'll just leave without paying anything more. so I payed what was orginally owed for the heads and was glad to see the bk of them.. if you are going to deal with hpe then make sure you drill it in to Gavins fat head exactly what your after or you could end up with something totally different. There is Peter at kennelly camshafts who does my work because I find I can trust him to do the right thing and not overcharge .. I would try him first. Cheers

Edited April 8, 2016 by hijacka

[hijacka]

Mind you the first visit to hpe I did drop the heads off to with a a4 size picture of the heads that had been chambered cnc'd got there in the end but can't recommend them. Cheers

[arnegs]

 hijacka said:

Think he is talking about my heads. I sold them..hpe have a guy that works there is very well known for excellence in hand grinding work. It's not what I asked gavin for tbh. When I first dropped the heads in I asked them if they had the program to cnc the heads to ej25 cc and gavin said yeah yep we do sweet as after waiting about 1 month I returned to pay pickup and seen the heads had been deshouded this is not what a asked for and the deshrouding around the valve left high spots which will become hot spots not a good thing!after going backwards and forwards arguing with him getying hung up on going in there and embarrassing him in front of customers -3 months later I returned and picked them up.. he then tried to charge me another 500 on top of the 1200 or why I already paid but he told me he would cc and hand grind the heads at no charge lol but because his boy spent al day on them he thought it was justified lol I basically told him to get ***** and I'll just leave without paying anything more. so I payed what was orginally owed for the heads and was glad to see the bk of them.. if you are going to deal with hpe then make sure you drill it in to Gavins fat head exactly what your after or you could end up with something totally different. There is Peter at kennelly camshafts who does my work because I find I can trust him to do the right thing and not overcharge .. I would try him first. Cheers

Sweet thanks for the info man. I'll look into it.

[hijacka]

No worries seeing your heads are v5/6 then perhaps might be easier to go the special pistons designed for it that give abit more volume.. they aren't designed for the v3/4 clover shape chambers and I was going for destroker pistons with offset gungeon pin so that wasn't a option at the time. I don't think anyone in new zealand has a program to cnc to ej25 spec which off the top of my head is around 52 cc but don't quote me on. Let us know what Peter can offer. . He does all of Frasers work to

[Guest]

V8 sti heads dude.

[hijacka]

Ok well there ya go do you know the volume difference between the 2? Im in the market for some v8sti heads if anyone can help